Multiplicity and pseudo-rapidity density distributions of charged particles produced in pp, pA and AA collisions at RHIC & LHC energies

被引：8

作者：

Basu, Sumit ^{[1
,2
]}

Thakur, Sanchari ^{[3
]}

Nayak, Tapan K. ^{[4
,5
]}

Pruneau, Claude A. ^{[1
]}

机构：

[1] Wayne State Univ, Dept Phys & Astron, Detroit, MI 48201 USA

[2] Lund Univ, Dept Phys, Div Particle Phys, Box 118, SE-22100 Lund, Sweden

[3] HBNI, Variable Energy Cyclotron Ctr, Kolkata 700064, India

[4] HBNI, Natl Inst Sci Educ & Res, Jatni 752050, India

[5] CERN, CH-1211 Geneva 23, Switzerland

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2021年 / 48卷 / 02期

关键词：

QGP; particle production; relativistic heavy-ion collisions; NUCLEUS-NUCLEUS COLLISIONS; PROTON-PROTON COLLISIONS; COLOR GLASS CONDENSATE; HEAVY-ION COLLISIONS; PB-PB COLLISIONS; PSEUDORAPIDITY DENSITY; LIMITING FRAGMENTATION; CENTRALITY DEPENDENCE; TRANSVERSE-MOMENTUM; SATURATION;

D O I：

10.1088/1361-6471/abc05c

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Multiplicity and pseudorapidity (eta) density (dN(ch)/d eta) distributions of charged hadrons provide key information towards understanding the particle production mechanisms and initial conditions of high-energy heavy-ion collisions. However, detector constraints limit the eta-range across which charged particle measurements can be carried out. Extrapolating the measured distributions to large eta-range by parameterizing measured distributions and by using calculations from event generators, we characterize the production of charged particles over the full kinematic range. In the present study, we use three different ansatze to obtain quantitative descriptions of the shape of pseudorapidity distributions of charged hadrons produced in pp, p-A, and A-A collisions for beam energies (root s(NN)) ranging from a few GeV to a few TeV corresponding to RHIC and LHC energies. We study the limiting fragmentation behavior in these collisions and report evidence for participant-scaling violations in high-energy collisions at the TeV scale. We additionally examine measured pseudorapidity distributions to constrain models describing initial conditions of particle production. We predict the centrality dependence of charged particle multiplicity distributions at FAIR and NICA energies and give an estimation of charged particle multiplicity at eta = 0 for the proposed HE-LHC and FCC energies.

引用

页数：24

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